* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
}
ul,
ol {
  list-style: none;
}
img {
  min-width: 100%;
}


.container{
    width: 70vw;
    background-color: lightblue;
    margin: 0 auto;
}
.container .leftarea{
    width: 30vw;

}
.container .leftarea .checkimgcontainer{
    width: 30vw;
    height: 30vw;
}

.container .leftarea .imglist{
    margin-top: 20px;
    width: 100%;
    height: 100px;
    background-color: blueviolet;
}
.container .rightarea{
    width: 30vw;
    height: 30vw;
    margin-left: 20px;
    background-color: aqua;
}
.container .rightarea .bigimgcontainer{
    width: 100%;
    height: 100%;
}
.container .rightarea .bigimgcontainer img{
    width: 100%;
    height: 100%;
}